package com.alipay.servlet;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.alipay.config.AlipayConfig;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * 支付
 */
@WebServlet(name = "PayServlet",urlPatterns = "/PayServlet")
public class PayServlet extends HttpServlet {
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		//商户订单号，商户网站订单系统中唯一订单号，必填
		String out_trade_no = request.getParameter("WIDout_trade_no");
		//付款金额，必填
		String total_amount = request.getParameter("payMoney");
		//订单名称，必填
		String subject = request.getParameter("WIDsubject");
		//商品描述，可空
		String body = request.getParameter("WIDbody");

		//获得初始化的AlipayClient
		AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id,
				AlipayConfig.merchant_private_key, "json", AlipayConfig.charset,
				AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
		//设置请求参数
		AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
		alipayRequest.setReturnUrl(AlipayConfig.return_url);
		alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
		alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
				+ "\"total_amount\":\""+ total_amount +"\","
				+ "\"subject\":\""+ subject +"\","
				+ "\"body\":\""+ body +"\","
				+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

		//请求
		String result = null;
		try {
			response.setContentType("text/html; charset=utf-8");
			PrintWriter out  = response.getWriter();
			result = alipayClient.pageExecute(alipayRequest).getBody();

			System.out.println("支付结果："+result);
			//输出
			out.println(result);
			out.close();
		} catch (AlipayApiException e) {
			e.printStackTrace();
		}


	}
}
